Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea942ea2dbe2378…

MALICIOUS

PDF

48.4 KB Created: 2020-08-05 04:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e82e7ffe8fdabef1d45b8f1367f2577b SHA-1: 0381a982be4178053ddaec1d370ef743ae709cee SHA-256: 9ea942ea2dbe2378a68380cc624f05c4617449dfbf06acce11ddcbad9f3bc78d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be a link farm designed to lure users to malicious sites, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=adelbert+von+chamisso+la+maravillosa+historia+de+peter+schlemihl+pdf
    • http://files.roadhomefredericton.com/uploads/1/3/1/6/131636946/sapajudibafapebale.pdf
    • http://files.sstvipgroup.com/uploads/1/3/2/7/132740595/962ea.pdf
    • http://files.newworldwineshop.com/uploads/1/3/2/6/132681362/2943963.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/16633449245.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/jidujetetimuziz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/88309384406.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/vernier_caliper_measurement.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/powermate_54_series_generator_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/2940/5600/files/rejigavewaretor.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/ruzoxutirupofatilefov.pdf
    • https://cdn.shopify.com/s/files/1/0430/0275/7281/files/dofujiwaxila.pdf
    • https://cdn.shopify.com/s/files/1/0428/4245/6231/files/bromazepam_bula.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/nunetededomaleba.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4930/files/dituxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/74562888712.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/45321921708.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006629.bin
404f7f25e6afa7b0db08f54917e9a6b59e8a2f391691049a013e24b1eed6a5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6629 6240 bytes
font_01_sfnt_off00007b29.bin
5ab1349b7a35ae4cbe6270fff57540bec9bd3b43a2b733161c06215c7b62545c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B29 5584 bytes
font_02_sfnt_off00008dfb.bin
97f374795cb5c2137a8b74f76d8af7b666383af76f3ae65f7bb7bdc008c2918e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFB 10680 bytes

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